Abstract: In a multi-piece solid golf ball comprising a solid core and a cover consisting of inner and outer layers, the cover inner layer is composed mainly of an ionomer resin, and the cover outer layer is composed mainly of another thermoplastic elastomer. A thermoplastic resin-base adhesive layer is interposed between the cover inner and outer layers, or a thermoplastic resin-base adhesive is blended in the inner and/or outer layer cover stock.

Abstract: In a golf ball including a core and a cover of at least one layer, the cover layer is formed of a heated mixture of an ionomer resin and a metal salt such as magnesium stearate. The heated mixture exhibits such a crystal melting behavior that when measured by DSC, the difference between first and second peak temperature is up to 30° C. The ball is improved in resilience.

Abstract: A solid golf ball has a solid core and a cover formed of a resin composition comprising the reaction product of a thermoplastic polyurethane elastomer with dicyclohexylmethane-4, 4″-diisocyanate. The ball is efficiently moldable and meets such requirements as a pleasant feel, ease of control, high resilience, and minimized scuffs by iron shots.

Abstract: A golf ball having a core and a cover enclosing the core. The cover has one or more layers. At least one of the cover layers is composed mainly of a rubber-modified thermoplastic resin composition consisting essentially of a base resin in the form of an ionomer resin, a non-ionomer thermoplastic elastomer or a mixture thereof and a crosslinked functional rubbery copolymer.

Abstract: A golf ball comprising a core and a cover enclosing the core, said cover having one or more layers,

Abstract: In a golf ball comprising a core and a cover of at least one layer, the cover layer is formed of a heated mixture of an ionomer resin and a metal salt such as magnesium stearate. The heated mixture exhibits such a crystal melting behavior that when measured by DSC, the difference between first and second peak temperatures is up to 30° C. The ball is improved in resilience.

Abstract: The invention provides a golf ball cover stock based on a heated mixture of (a) an ionomer resin, (b) polyethylene, and (c) an epoxy group-modified polyolefin or (d) a low molecular weight polyethylene wax. Component (c) or (d) improves the dispersion of polyethylene in the ionomer resin so that a larger amount of polyethylene may be blended in micro-dispersion form. A golf ball having a cover made of the cover stock is durable and wear resistant and offers a good feel when hit.

Abstract: In a multi-piece solid golf ball comprising a solid core and a cover consisting of inner and outer layers, the cover inner layer is composed mainly of an ionomer resin, and the cover outer layer is composed mainly of another thermoplastic elastomer. A thermoplastic resin-base adhesive layer is interposed between the cover inner and outer layers, or a thermoplastic resin-base adhesive is blended in the inner and/or outer layer cover stock.

Abstract: A cover stock composed mainly of a heated mixture of a thermoplastic polyurethane elastomer and a polyolefin oligomer or polyolefin which has been modified with functional groups is suitable for the manufacture of golf balls. The cover made of the stock has improved scuff resistance.

Abstract: In a multi-piece solid golf ball comprising a solid core and a cover consisting of inner and outer layers, the cover inner layer is composed mainly of an ionomer resin, and the cover outer layer is composed mainly of another thermoplastic elastomer. A thermoplastic resin-base adhesive layer is interposed between the cover inner and outer layers, or a thermoplastic resin-base adhesive is blended in the inner and/or outer layer cover stock.

Abstract: An ionomer resin component containing (a) a ternary ionomer resin and optionally (b) a binary ionomer resin, optionally blended with (c) a non-neutralized olefin-unsaturated carboxylic acid random copolymer, is blended with (d) a metal soap of a fatty acid neutralized with a Ca, Mg or Zn cation in a weight ratio from 95:5 to 80:20. A golf ball cover composition based on this mixture has a melt index of 1-10 dg/sec. The cover composition is drastically improved in moldability, resilience and paint coating adhesion. A golf ball having a cover made of the composition is improved in feel and flight performance.

Abstract: A cover stock composed mainly of a heated mixture of a thermoplastic polyurethane elastomer and a styrene base block copolymer is suitable for the manufacture of golf balls. The cover made of the stock offers a very soft feel with little shock, the ease of control and improved scuff resistance.

Abstract: In a multi-piece solid golf ball comprising a solid core, an intermediate layer, and a cover, the intermediate layer is formed mainly of a thermoplastic resin and has a Shore D hardness of 8-35, and the cover is formed of a cover stock comprising a thermoplastic resin and an optional inorganic filler. The Shore D hardness of the cover is at least 25 units higher than that of the intermediate layer. The ball has a very soft pleasant feel upon approach shots and putting and an increased flight distance upon full shots with a driver.

Abstract: The invention provides a golf ball cover stock based on a heated mixture of (a) an ionomer resin, (b) polyethylene, and (c) an epoxy group-modified polyolefin or (d) a low molecular weight polyethylene wax. Component (c) or (d) improves the dispersion of polyethylene in the ionomer resin so that a larger amount of polyethylene may be blended in micro-dispersion form. A golf ball having a cover made of the cover stock is durable and wear resistant and offers a good feel when hit.

Abstract: The invention provides a golf ball cover stock based on a heated mixture of (a) an ionomer resin, (b) polyethylene, and (c) an epoxy group-modified polyolefin or (d) a low molecular weight polyethylene wax. Component (c) or (d) improves the dispersion of polyethylene in the ionomer resin so that a larger amount of polyethylene may be blended in micro-dispersion form. A golf ball having a cover made of the cover stock is durable and wear resistant and offers a good feel when hit.

Abstract: A cover stock composed mainly of a heated mixture of a thermoplastic polyurethane elastomer and a polyolefin oligomer or polyolefin which has been modified with functional groups is suitable for the manufacture of golf balls. The cover made of the stock has improved scuff resistance.

Abstract: A cover stock composed mainly of a heated mixture of a thermoplastic polyurethane elastomer and a polyolefin oligomer or polyolefin which has been modified with functional groups is suitable for the manufacture of golf balls. The cover made of the stock has improved scuff resistance.

Abstract: In a multi-piece solid golf ball comprising a solid core, an intermediate layer, and a cover, the intermediate layer is formed mainly of a thermoplastic resin and has a Shore D hardness of 8-35, and the cover is formed of a cover stock comprising a thermoplastic resin and an optional inorganic filler. The cover has a Shore D hardness of 40 to less than 57. The Shore D hardness of the cover is at least 15 units higher than that of the intermediate layer. The ball has a very soft pleasant feel upon approach shots and putting, ease of control upon iron shots, and improved flight performance upon full shots with a driver.

Abstract: In a multi-piece solid golf ball comprising a solid core and a cover consisting of inner and outer layers, the cover inner layer is composed mainly of an ionomer resin, and the cover outer layer is composed mainly of another thermoplastic elastomer. A thermoplastic resin-base adhesive layer is interposed between the cover inner and outer layers, or a thermoplastic resin-base adhesive is blended in the inner and/or outer layer cover stock.

Abstract: A multi-piece solid golf ball comprising a solid core, an intermediate layer, and a cover is provided. When the solid core has a deflection A (mm) under a load of 100 kg and a spherical body consisting of the core and the intermediate layer has a deflection B (mm) under a load of 100 kg, B/A is between 1.0 and 1.5. The ball has a very soft pleasant feel upon approach shots and putting, ease of control upon iron shots, and improved flight performance upon full shots with a driver.